① dynamo leather belt loosens too or wear away serious
② dynamo installation is improper bring about a foot aperture and bolt wear away for long, the different of generation bolt aperture, cannot secure a dynamo, shake the abnormal knocking that give out.
③ dynamo bearing damages, bring about to be short of oil more, (when the examination, detachable debus leather belt, rotational dynamo wind leaf, fine the abnormal knocking that listens to bearing to whether be given out)
④ dynamo rotor and stator are touched brush (concern with bearing attaint more, rotor position deflection, chafe with stator)
Leaf of ⑤ dynamo wind is out of shape, the mechanical responsiveness outside sufferring is sent be out of shape with the dynamo crust happening chafes
